Crushing mill



Patented Dec. 23, 1924.

HNITED STATES PATENT OFFICE,

CRUSHIN'G MILL.

Application filed June 9,

To all whom it may concern.

Be it known that I, EMIL BnirrHnLMEss, a citizen of the German Republic,of Dusseldorf-()berkassel, Germany, have invented certain Improvementsin Crushing Mills, of which the following is a specification.

This invention relates to a crushing-mill of the ring-and-roller type,and its object is so to construct the mill that the crushing mechanismcan be assembled outside the casing and treated, in respect of itsapplication to and removal from the casing, as a separate, completestructure. Vith this object in view, the invention consists in theprovision of a casing fitted with a detachable hood and slotted sidewalls into which the bearings of the roller shafts can be slid radiallytogether with all the assembled elements of the crushing-mechanism.

Figs. 1 and 2 of the accompanying drawings represent elevations at rightangles of the complete apparatus,

Figs. 3 and 4;, elevations at right angles of the assembledcrushing-mechanism, and

Figs. 5 and 6, corresponding views of the casing without the hood.

The crushing-mechanism of the mill comprises a crushing-ring 0 and threecrushingrollers (Z. The latter work against the inside of the ring,rotation being imparted to the crushing-elements by means of the shaft 6of one of the rollers which is arranged centrally above the otherrollers. A driving pulley 2' is secured to the shaft e. Bearings m aremounted on the shaft 0 and bear ings n are mounted on the shafts 0 ofthe lower rollers. Buffer springs h are arranged between adjacentbearings so as to force the rollers d resiliently against thecrushingring. All these elements can be assembled, as shown in Figs. 3and 4t, and introduced into the milling-casing a as a separate, completestructure. The casing is divided on level with the driving shaft 6, theupper, hood-part 5 being detachable to admit the crushing-mechanism.Semi-circular notches (I in the side walls of the hood and casing 1924.Serial No. 718,994.

accommodate the shaft 6, and the side walls of the casing haveopen-ended slots p through which the shafts 0 are admitted in atransverse direction. The bearings m are fitted with brackets 1 wherebythey are supported on shoulders 8 formed on the reinforcement ribs ofthe casing, and hooked lugs t on the brackets 0, drop into engage mentwith screw-bolts f whereby the entire crushing-mechanism can be firmlysecured in position. All that is required for the removal of thecrushing-mechanism from the casing, therefore, is the detachment of thehood I) and a loosening of the screws f.

Vertical slides Z (Fig. 1) may be used for covering the slots 79 afterthe introduction of the mechanism. The feed chute Z: of the mill isconnected to the casing a. so as to leave a free passage for theadmittance and the removal of the crushing-mechanism.

I claim 1. In a crushing-mill, the combination with a cruslung-mechanismcomprising a crushing-ring, crushing-rollers fitted on shafts andarranged inside said ring, bearings mounted on the roller shafts, andbuffer springs abutting against adjacent bearings so as to force therollers against the rings, of a casing which is slotted so as to admitsaid crushing-mechanism transversely of the roller shafts as a complete,assembled structure.

2. In a crushing-mill. the combination with a crushing-mechanismcomprising a crushing-ring, crushing-rollers fitted on shafts andarranged inside said ring, bearings mounted on the roller shafts, andbuffer springs abutting against adjacent bearings so as to force therollers against the ring, of a casing which is slotted so as to admitsaid crushing-mechanism transversely of the roller shafts as a complete.assembled structure, and means for securing the crushingmechanism inposition through the medium of the bearings of one of the roller shafts.

EMIL BARTHELMESS.

